Battery module and battery pack

Abstract

A battery module comprising a plurality of battery cells having two opposite ends, a first busbar assembly comprising at least a first busbar coupled with a first busbar frame, and a second busbar assembly comprising at least a second busbar coupled with a second busbar frame configured to electrically couple the battery cells, and a main frame having side walls forming a housing and a middle wall inside the housing dividing an inner space of the housing in a vertical direction to a first and a second section, wherein the middle wall comprises a plurality of holes for receiving the battery cells such that one end of battery cell is in the first section and another end is in the second section, and wherein the middle wall further comprises a plurality fastening members for fastening the first busbar assembly to the main frame in the first section and the second busbar assembly to the main frame in the second section such that the battery cells are arranged between the first and the second busbar assemblies which couple the battery cells to the battery module.

1 . A battery module comprising:
 a plurality of battery cells having two opposite ends;   a first busbar assembly comprising at least a first busbar coupled with a first busbar frame, and a second busbar assembly comprising at least a second busbar coupled with a second busbar frame configured to electrically couple the battery cells; and   a main frame having side walls forming a housing and a middle wall inside the housing dividing an inner space of the housing in a vertical direction to a first and a second section, wherein the middle wall comprises a plurality of holes for receiving the battery cells such that one end of each battery cell is in the first section and another end is in the second section, and wherein the middle wall is substantially in the middle of the battery cells in the vertical direction supporting the battery cells substantially from the middle, and   wherein the middle wall further comprises a plurality fastening members for fastening the first busbar assembly to the main frame in the first section and the second busbar assembly to the main frame in the second section such that the battery cells are arranged between the first and the second busbar assemblies which couple the battery cells to the battery module.   
     
     
         2 . The battery module of  claim 1 , wherein the main frame comprises a first conduit in vicinity of a first end of the frame for leading a heat transfer substance into the battery module, and a second conduit in vicinity of a second end of the frame for leading the heat transfer substance out of the battery module. 
     
     
         3 . The battery module of  claim 2 , wherein the first conduit comprises one or more inlets for leading the heat transfer substance into the first and/or the second section of the frame, and the second conduit comprises one or more outlets for leading the heat transfer substance out of the first and/or second section of the frame. 
     
     
         4 . The battery module of  claims 2 , wherein the first and/or the second busbar frame comprises at least one groove in vicinity of the ends of the battery cells configured to enable access of the heat transfer substance to the ends of the battery cells. 
     
     
         5 . The battery module of  claim 4 , wherein the groove forms a channel network in the busbar frame to enable access of the heat transfer substance to a plurality of the ends of the battery cells. 
     
     
         6 . The battery module of  claim 1 , wherein the first busbar frame is arranged between the first busbar and the battery cells, and the second busbar frame is arranged between the second busbar and the battery cells. 
     
     
         7 . The battery module of  claim 1 , wherein there is a gap between the first busbar assembly and the middle wall in the first section, and between the second busbar assembly and the middle wall in the second section of the frame. 
     
     
         8 . The battery module of  claim 1 , wherein there is a gap between the adjacent battery cells arranged between the first and the second busbar assemblies. 
     
     
         9 . The battery module of  claim 1 , wherein at least part of the fastening members of the middle wall comprises at least one guiding wall configured to guide a flow of the heat transfer substance inside the battery module. 
     
     
         10 . The battery module of  claim 1 , wherein a first edge of the side walls of the main frame comprises a first locking element and a second edge of the side walls of the main frame comprises a second locking element, wherein the second locking element is configured to receive the first locking element. 
     
     
         11 . The battery module of  claim 1 , wherein the middle wall is substantially in the middle of the housing in a vertical direction. 
     
     
         12 . The battery module of  claim 1 , wherein the side walls comprise one or more fastening members for coupling a plurality of the battery modules together. 
     
     
         13 . A battery pack comprising a plurality of a battery modules of  claim 1 . 
     
     
         14 . The battery pack of  claim 13 , wherein a plurality of the battery modules is stacked one on the other wherein a top and a bottom module comprises a cover. 
     
     
         15 . The battery pack of  claim 13 , wherein the cover of the top or the bottom module comprises an inlet connector and an outlet connector for leading a heat transfer substance into and/or out of a first and/or a second conduit of a main frame of the battery module.